National Science Foundation: Coupling of PARFLOW and
CrunchFlow for High Resolution Reactive Transport Modeling of Variably
Saturated Flow

In collaboration with Reed Maxwell (CSM) and Carl
Steefel (LBL) we are working on coupling the reactive transport
numerical simulator CrunchFlow with the integrated watershed surface
water - groundwater flow simulator to provide unprecedented parallel
capabilities for simulating geochemically reactive environments where
surface water and groundwater exchange is an important process. This
numerical tool will provide us with the ability to model such processes
as C,N exchange in hyporheic zones and long-term weathering, climate
feedbacks. Current capabilities include simulation of kinetic
geochemical reactions in heterogenous porous media (movie to the right
shows a reaction front moving through a geostatistically distributed
permeability field).